Class-prediction analysis identifies a genomic classifier for ALK⁻ ALCL. (A) Heat map showing the expression of the 6 genes included in the Prediction Analysis of Microarrays classifier, together with ALK, GZMB, and PRF1 in ALCL, PTCL-NOS, and AITL used in the analysis. (B) Box-plot representation of the same genes in the full dataset of 249 samples, including normal donors and adult T-cell leukemia/lymphoma tumors. The Kruskal-Wallis P value is indicated for each transcript.